Assignee
Inventors
- Manabu Kitamoto (9 patents)
- Yasunori Ichikawa (41 patents)
- Keiichiro Shimizu (12 patents)
- Eiji Kuwahara (32 patents)
- Masao Amano (30 patents)
- Masayuki Hibi (11 patents)
- Keizo Iwata (2 patents)
US Patent 5218838 · Granted Jun 15, 1993